Relay.



twitmeoojzo' v i v avww vt z 1 a f I W 1% No. $14 ,501. PATENTED MAR. 6, 1906.

' J. ALLEN.

RELAY.

APPLICATION mum JULY 31. 1905.

' Woman, 1

' contacts 7 and 8, mounted upon supports 9 being delicate, is totally unfit for a certain coil system 3.

pecially when the relay is to be worked by in- JAMES ALLEN, OF THE PATENT o FIon UNITED STATES ARMY.

RELAY.

Speciflcation of Letters Patent.

Patented March 6,1906.

Application filed July 31, 1905. Serial No. 271,968.

To all whom it may concern:

Be itknown that I, J AMES AnLEN, colonel, Signal Corps, United States Arm a citizen of the United States, residing at vi ashington, in the District of Columbia, have invented certain new and useful Improvements in Relays and I do hereby declare the followin to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the'same.

This invention relates to improvements in relays; and it consists in the novel combination and arrangement of parts herein described, and more particularly pointed out in the accompanying claims.

Referring to the accompanying drawings, Figure 1 represents in top plan a form of relay embodying my invention, and Fig. 2 a detail perspective of retaining-armature.

In carrying out the form of my invention shown I provide a preferably permanent horseshoe field-ma net 1, having pole-pieces 2. Within the fiefil of this magnet and between the pole-pieces 2 is mounted for deflective movement either upon pivots or suspensions in any'of the wellknown ways a The coil 3 may move around a stationary soft-iron core 4, supported upon a non-magnetic support 5, as in the well-known DArsonval galvanometer or Weston movable coil instruments,

Mounted for movement b coil 3 is a tongue 6, preferabl of some light non-magnetic metal. One en of this tongue is adapted to move between two adjustable and with the and 10, respectively, secured to and insulated from the magnet, as shown.

The combination of parts thus far described in detail is old. Such a relay, however, while character of work-viz., that in which a polarized relay or one fulfilling the functions of a polarized relay is require and more esduced or secondary currents or to be used in p, circuit in which there is a condenser. In such cases it is essential that the relay-tongue remain against the contact to which it was last sent after the actuating-current has died out or it! insufficient by itself tolonger hold the tongue against the contact. This hold: over action is secured in the common form of '17, to which the armature is (indicated in the coil 3 in one direction its angular polar relay bymeans of a permanently-polarized armature movable between the poles of an electromagnet.

I accomplish the same result in the present form of relay by mounting a small soft-iron armature 12 for movement by and with the movable coil between two auxiliary adjustable pole-pieces consisting in" the case illustrated of two steel screws 13 and 14, mounted in-iron or steel supports 15 and 16,- made fast to the ole-pieces 2. The armature may be secure .to the movable coil in a number of Ways. In the case illustrated this is effected by providing the tongue 6 with an extension rigidly fixed, as at 18.

Current from the main "operating-circuit part bywires 19) maybe led into and out of the movable coil by small flexible leads, as shown, or in any other suitable Way. The relay-circuit is connected by wire 20 to the tongue 6 in any desired manner and by wire 21 to one of tongue-contacts. It will thereforebe seen that when current traverses motion will send the tongue 6 against one of the contacts. At the same time one of the ends of the armature 12 will be sent toward one of the adjustable polepieces 13 14, by which the said armature will be attracted and held untila currentis passed through the coil 3 in an opposite direction of sufiicient strength to overcome the'pull of the magnet on the arma ture 12, when the tongue will be thrown to the opposite contact and the armature 12 to the opposite adjustable pole.

It will be seen that the current to move the coil must be strong enough to overcome the pull of the auxiliary pole-pieces. Therefore 1f the tongue is sent over against 'a given contact by current through the movable coil a succeeding though very feeble current, not intended for the operation of the instrument, would cause the tongue to be sent against the opposite contact were it not for the pull of the auxiliary poles, which this Weaker current would have to overcome.

The above characteristics. render this instrument particularly well adapted for cable use and also for use on board ships or on any other body subject to a. vibrating motion which would be apt to shake the relay-tongue back and forth between its contact-stops. I 1 do not, however, confine my invention to the type of instrument shown, as it may be made in man' forms without departing from the spirit 0 my invention; but

What I do claim is 1. A relay having a system mounted for deflective movement in a magnetic field, an armature mounted for movement by said system and independent of the magnetization of said system, and a pair of poleieces between which said armature is a apted to oscillate. v

2. A relay having a coil system mounted for deflective movement in a magnetic field, a soft-iron armature mounted for movement by said system and independentof the magnetization of said system, and apairof a, justable pole-pieces between which said armature is adapted to oscillate.

3. In a relay, the combination with a magnet, of a coil mounted for defiective movement between the poles of said magnet, a contact-tongue mounted for m'ovement by said coil. contact-stops for said tongue, an arrna ture mounted for movement by said coil but I independent of the ma netization thereof,

i said co1l,contactstops for said tongue, a softiron armature operatively connected to said tongue and coil ut independent of the magnetization of said coil, and a pair of adjustable pole-pieces between which said armature is arranged to oscillate.

In testimony whereof I affix my signature in presence of two witnesses.

JAMES ALLEN.

Witnesses:

E. A. JENNET,

GEo. A. WARREN. 

